Biology Chapter 11 Bio Energetic Mcqs Test Online Punjab Class 11th

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Question 1 of 10

Biology

1. Removal of the source of carbon dioxide from photosynthesizing chloroplasts results in rapid changes in the concentration of certain chemicals.

Which one of the following represents the correct combination of concentration changes?

	ATP	Ribulose bishposphate	Phosphoglyceric acid (PGA)
A	Decreases	Decreases	Increases
B	Decreases	Increases	No change
C	Increases	Increases	Decreases
D	Increases	No change	Increases

D

B

A

C

Question 1 of 10

Question 2 of 10

2. Carbon dioxide labeled with ¹⁴C has been used to identify the intermediate compounds in the Calvin cycle, the light-independent stage in photosynthesis. Which compound would be the first to contain the ¹⁴C?

Starch

RuBP

PGA

Glucose

Question 2 of 10

Question 3 of 10

3. ATP synthesis during light reactions is

Photophosphoryation

Oxidative

Photolysis

Substrate phosphorylation

Question 3 of 10

Question 4 of 10

4. Photo respiration takes place only in

Mitochondria

All cells of the plant

Root

Green parts of the plant

Question 4 of 10

Question 5 of 10

5. During dark reactions the three carbon atoms of 3-PGA are derived from

CO₂ only

RuBP + CO₂

RuBP only

RuBP + CO₂ + PEP

Question 5 of 10

Question 6 of 10

6. Chlorophyll is soluble in

Not in any solvent

Organic solvent

Water

Water and organic solvent

Question 6 of 10

Question 7 of 10

7. In C₃ plants first stable product of photosynthesis during dark reaction is:

PGAL

Oxaloacetate

RuBP

PGA

Question 7 of 10

Question 8 of 10

8. What are the products of the light reactions in photosynthesis?

ATP, NADPH₂ and oxygen

ATP, PGA and oxygen

ATP, PGA and NADH₂

ATP and NADP

Question 8 of 10

Question 9 of 10

9. During the light dependent stage of photosynthesis, the photo activated pigment removes an electron from the hydroxylation derived from the water molecule. The fate of the free hydroxyl radical is that it:

Reduces carbon dioxide to sugar

Is used to raise the activation level of chlorophyll by donating positive charge

Is used to produce adenosine triphosphate from adenosine diphosphate

Is broken down into oxygen and a free radical of hydrogen

Question 9 of 10

Question 10 of 10

10. In C₄ plants, fixation of CO₂ occurs in

Spongy mesophyll and bundle of sheath

Phloem tissue

Cortex of stem

Palisade tissue

Question 10 of 10

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